Atractylidae Hincks, 1868 Bimeridae Allman, 1872 Clavopsellidae Thiel, 1962 Dicorynidae Allman, 1864 Hippocrenidae McCrady, 1959 Lizusidae Haeckel, 1879 Margelidae Haeckel, 1879 Nemopsidae L.Agassiz, 1862 Pachycordylini Cockerell, 1911 Bougainvilliidae is a family of marine hydroids in the class Hydrozoa. Members of the family are found worldwide....